Let us take the aforementioned "embarrassing things" list as a challenge, because when humans are frantically jamming their private parts into other humans' deep, dark orifices in middle of the night with no lights on, the result can be much worse than "saying the wrong name." Off the top of my head:

Saying your daughter's name.

Saying a pet's name.

Poop.

Hitting your gag reflex during a blowjob, and subsequently vomiting on a dick.

Hitting your gag reflex during cunnilingus, vomiting on a vagina, and subsequently causing a yeast infection.